The MicroRAE is a handheld wireless diffusion instrument that simultaneously monitors up to four gases, including Hydrogen Sulfide (H2S),Carbon Monoxide (CO), Oxygen (O2) and Combustibles (LEL).With its wireless connectivity options, the MicroRAE can deliver real-time instrument readings and alarm status to the Honeywell Safety SuiteSoftware. This enables continuous, instant visibility of safety threats for faster, more informed decisions, to protect workers,facilities, and the environment, and to optimize operations Base: PGM-2600 Certification: Custom Union Wireless: BLE+Wi-Fi+GPS Socket1 Sensor: LEL - Includes H2S LEL filter (014-3603-000) Socket2 Sensor: Empty Socket3 Sensor: CO 0 to 1,000 ppm Socket4 Sensor: Empty Kits: Mintor Only